Re: [Discuss-gnuradio] Problem with simple implementation of sink block

[Marcus Müller]

The histogram sink calculates a histogram over the N last samples, with N set by configuring "number of points"; hence, if that is e.g. 1024 (default value), all counts must be ≤1024 and ∑(counts)=1024.

By the way, your block logic is a bit redundant: GNU Radio gives you then block.ninput_items_read method:

def work(self, input_items, output_items):
    self._i += 1 
    print self._i, self.ninput_items_read(0)
    return len(input_items[0])

Best regards,
Marcus

On 12.02.2016 03:29, Maicon Kist wrote:

Hi,

I am having a problem with a simple block implementation in GNURadio:

I developed a python block to count the quantity of numbers received. 

The problem arises when I compare the quantity of numbers received by my block with the ones counted in a Qt Histogram.

My flowgraph is:

 ————————                  ——————

| Random Source |———— >| my_block    |

 ————————        |         ————— —

                                      |

                                      |

                                      |        ———————— 

                                      |—  >| QT Histo Sink    |

                                               ————————  

When executing, my block prints it received millions of numbers, whereas the QT Histo Sink is showing only a few hundreds.

Any suggestions?

The work function of my block is as follows: 

####################### my block code

def work(self, input_items, output_items):

in0 = input_items[0]

num_input_items = len(in0)

    self._i += 1

    self._num_input_items_total += num_input_items

        if self._i % 10000 == 0:

print self._i, self._num_input_items_total

    return len(in0)

########################

Best Regards

-- 

Maicon Kist

-- 
Maicon Kist

_______________________________________________
Discuss-gnuradio mailing list
address@hidden
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio